Radioprotection calculations for the trade experiment

The TRADE project is based on the coupling, in a subcritical configuration, of a 115 MeV, 2 mA proton cyclotron with a TRIGA research reactor at the ENEA Casaccia Centre (Rome). Detailed radioprotection calculations using the FLUKA and EA-MC Monte Carlo codes were performed during the feasibility study. The study concentrated on dose rates due to beam losses in normal operating conditions and in the calculation of activation in the most sensitive components of the experiment. Results show that a shielding of 1.4 m of baryte concrete around the beam line will be sufficient to maintain the effective doses below the level of 10 μSv/h, provided that the beam losses are at the level of 1 nA/m. The activation level around the beam line and in the water will be negligible, while the spallation target will reach an activation level comparable to the one of a fuel element at maximum burnup. (authors)